Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite
X-ray computed tomography (XRT) has gradually established its position as a non-destructive and, therefore, reproducible three-dimensional (3D) investigation technique, allowing for material- and geometry-independent applications. In the context of this study, XRT provides an enhanced understanding...
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MDPI AG
2024-12-01
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| Series: | Ceramics |
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| Online Access: | https://www.mdpi.com/2571-6131/7/4/117 |
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| author | Anita Razavi Vanessa Hopp Dominik Hahn Almuth Sax Peter Quirmbach |
| author_facet | Anita Razavi Vanessa Hopp Dominik Hahn Almuth Sax Peter Quirmbach |
| author_sort | Anita Razavi |
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| description | X-ray computed tomography (XRT) has gradually established its position as a non-destructive and, therefore, reproducible three-dimensional (3D) investigation technique, allowing for material- and geometry-independent applications. In the context of this study, XRT provides an enhanced understanding of thermal-induced microstructural changes in an andalusite-based refractory, which are not apparent from the limited two-dimensionality of conventional optical investigation techniques. By subjecting an andalusite-based sample to an XRT scan after temperature treatments of T = 110 °C, 800 °C, 1000 °C, 1200 °C and 1400 °C, the XRT technique in this study introduced a novel perspective on the sintering process of andalusite refractory materials. The XRT investigation focused on the thermal-induced defect and crack evolution of the castable as a function of temperature. In addition to general sintering phenomena, this includes the formation of a capillary network filled with silica-rich glass phases (SiO<sub>2</sub>) due to the mullitization of andalusite. The results of the XRT analysis indicate the existence of glass bridges within these structures. |
| format | Article |
| id | doaj-art-6e0068f3e49f47df857634c83a2ce608 |
| institution | OA Journals |
| issn | 2571-6131 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Ceramics |
| spelling | doaj-art-6e0068f3e49f47df857634c83a2ce6082025-08-20T02:00:24ZengMDPI AGCeramics2571-61312024-12-01741867187910.3390/ceramics7040117Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on AndalusiteAnita Razavi0Vanessa Hopp1Dominik Hahn2Almuth Sax3Peter Quirmbach4Institute for Natural Sciences—Technical Chemistry and Corrosion Sciences, University of Koblenz, Universitaetsstr. 1, 56070 Koblenz, GermanyInstitute for Natural Sciences—Technical Chemistry and Corrosion Sciences, University of Koblenz, Universitaetsstr. 1, 56070 Koblenz, GermanyCalderys Technology Center, Calderys Deutschland GmbH, 56564 Neuwied, GermanyInstitute for Natural Sciences—Technical Chemistry and Corrosion Sciences, University of Koblenz, Universitaetsstr. 1, 56070 Koblenz, GermanyInstitute for Natural Sciences—Technical Chemistry and Corrosion Sciences, University of Koblenz, Universitaetsstr. 1, 56070 Koblenz, GermanyX-ray computed tomography (XRT) has gradually established its position as a non-destructive and, therefore, reproducible three-dimensional (3D) investigation technique, allowing for material- and geometry-independent applications. In the context of this study, XRT provides an enhanced understanding of thermal-induced microstructural changes in an andalusite-based refractory, which are not apparent from the limited two-dimensionality of conventional optical investigation techniques. By subjecting an andalusite-based sample to an XRT scan after temperature treatments of T = 110 °C, 800 °C, 1000 °C, 1200 °C and 1400 °C, the XRT technique in this study introduced a novel perspective on the sintering process of andalusite refractory materials. The XRT investigation focused on the thermal-induced defect and crack evolution of the castable as a function of temperature. In addition to general sintering phenomena, this includes the formation of a capillary network filled with silica-rich glass phases (SiO<sub>2</sub>) due to the mullitization of andalusite. The results of the XRT analysis indicate the existence of glass bridges within these structures.https://www.mdpi.com/2571-6131/7/4/117X-ray computed tomography (XRT)refractoriescrack propagationmulliteSiO<sub>2</sub>-glas bridgesdefect evolution |
| spellingShingle | Anita Razavi Vanessa Hopp Dominik Hahn Almuth Sax Peter Quirmbach Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite Ceramics X-ray computed tomography (XRT) refractories crack propagation mullite SiO<sub>2</sub>-glas bridges defect evolution |
| title | Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite |
| title_full | Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite |
| title_fullStr | Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite |
| title_full_unstemmed | Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite |
| title_short | Microstructural X-Ray Computed Tomography Investigation of the Defect Evolution in Refractory Castings Based on Andalusite |
| title_sort | microstructural x ray computed tomography investigation of the defect evolution in refractory castings based on andalusite |
| topic | X-ray computed tomography (XRT) refractories crack propagation mullite SiO<sub>2</sub>-glas bridges defect evolution |
| url | https://www.mdpi.com/2571-6131/7/4/117 |
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